Norton 66252830858 Type 11 Grinding Wheel 5in 46 Grit

Product Description

The NORTON 66252830858 is a Type 11 flaring cup grinding wheel designed for offhand tool grinding and surface conditioning applications. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal on high-speed steel, carbon steel, and general-purpose ferrous workpieces. The wheel measures 5 inches in diameter with a 1-3/4 inch overall thickness and carries a 46 grit, J hardness (medium grade) rating. A maximum operating speed of 4,585 RPM is stamped to the wheel per ANSI safety standards. The vitrified bond structure supports free cutting action during heavy-contact grinding passes. Licensed tool grinders and maintenance machinists are the primary installers and operators of this wheel.

This wheel is suited for pedestal grinders, bench grinders, and toolroom machines configured for Type 11 flaring cup geometry. The 3-3/4 inch hub diameter and 1-1/4 inch arbor hole match standard spindle configurations found on industrial tool grinders. Typical applications include resharpening lathe bits, milling cutters, drill bits, and general tool reconditioning in machine shops and maintenance facilities. The coarse 46 grit removes material efficiently on dull or heavily worn cutting edges before finish-grinding operations.

Key Features

• Aluminum oxide abrasive for consistent stock removal on ferrous tool steels
• Vitrified bond provides rigid, free-cutting wheel structure
• 46 grit, J hardness for aggressive material removal on worn tool edges
• Type 11 flaring cup geometry fits standard tool grinder spindles
• Rated to 4,585 RPM maximum operating speed
• Non-porous gray wheel body; manufacturer specification code 32A46-JVBE

Compatibility

Designed for use on Type 11 flaring cup wheel-compatible bench or pedestal tool grinders with a 1-1/4 inch arbor and spindle speeds not exceeding 4,585 RPM.

Installation Notes

Wheel mounting and dressing must be performed by qualified personnel following ANSI B7.1 safety requirements for abrasive wheel use. Always inspect the wheel for cracks or chips using the ring test before mounting, and never exceed the maximum RPM marked on the wheel. Power down and lock out the grinder before changing wheels, and use properly rated flanges and a blotter washer between the flange and wheel face. Eye protection and face shield use is required during grinding operations.